Frequently Asked Questions: Medical Use of Controlled Herb in Thailand

Everything You Need to Know About the New P.T.33 System and Patient Access

Is the Controlled Herb legal in Thailand?
The Controlled Herb is legal for medical use only in Thailand. As of 2025, the flower form is classified as a Controlled Herb. Patients must have a valid P.T.33 medical prescription issued by a licensed and DTAM-certified practitioner.

What is the P.T.33 form?
The P.T.33 is the new standardized prescription form mandated by Thailand’s Ministry of Public Health and the Department of Thai Traditional and Alternative Medicine (DTAM). It is required for dispensing Controlled Herb and related medical products.

Who can issue a prescription for the Controlled Herb in Thailand?
Only licensed healthcare professionals who have completed DTAM-approved training can issue the P.T.33 form. This includes:

  • Medical doctors

  • Thai traditional medicine practitioners

  • Licensed pharmacists

  • Dentists (in specific medical cases)

How do I get a P.T.33 prescription?
You must consult with a certified practitioner registered with the DTAM. They will assess your medical condition and determine if treatment with the Controlled Herb is appropriate. If approved, your P.T.33 will be securely submitted and linked to your Bai Sang Ya – Patient ID.

What medical conditions qualify for Controlled Herb treatment?
Thailand’s Ministry of Public Health has approved treatment with the Controlled Herb for conditions such as:

  • Chronic pain

  • Chemotherapy-induced nausea

  • Epilepsy

  • Parkinson’s Disease

  • Multiple sclerosis

  • Anxiety and insomnia (with proper diagnosis)

Your practitioner will evaluate if this treatment is suitable for your case.

Is the flower form of the Controlled Herb allowed?
Yes—but only with a valid P.T.33 prescription. The flower form is regulated as a Controlled Herb and cannot be legally sold or possessed without proper documentation.

How does Bai Sang Ya help?
Bai Sang Ya is Thailand’s secure Patient ID system for access to medical treatment with the Controlled Herb. Through our platform, you can:

  • Register and verify your identity

  • Book consultations with DTAM-certified doctors

  • Securely store and access your P.T.33 prescription

  • Show your Patient ID at licensed dispensaries

  • Stay 100% compliant with current regulations

Can I use my Patient ID at dispensaries?
Yes. Licensed dispensaries and authorized clinics can use your Bai Sang Ya Patient ID to verify your legal status and confirm your prescription via our secure portal.

Is recreational use of the Controlled Herb allowed?
No. Recreational use of the Controlled Herb is still illegal in Thailand. Only certified medical use through proper channels like Bai Sang Ya is permitted.

What happens if I use the Controlled Herb without a prescription?
Possession or use of the Controlled Herb without a valid P.T.33 form is illegal and may result in criminal penalties. Always use certified channels for legal access.

Stay Compliant. Stay Protected.
Bai Sang Ya is your trusted digital partner for legal, safe, and compliant access to the Controlled Herb for medical use in Thailand.

Have more questions? Contact us at verify@baisangya.com